Operation Shieldfall

Operation Shieldfall was a Sith mission to the planet Nam Chorios in 44 ABY that resulted in a battle between the forces of the New Jedi Order, the Lost Tribe of Sith, and the dark side entity Abeloth. After their tenuous alliance to destroy Abeloth was broken, both the Jedi and Sith pursued Abeloth—who had caused a psychosis amongst the Jedi. Sith apprentice Vestara Khai, along with Jedi Grand Master Luke Skywalker and his son, Ben, tracked Abeloth to Nam Chorios, where they met the Force-sensitive Theran Listeners and discovered that the Therans had fallen under Abeloth's control. Khai sent a message to her father, Gavar, who led a Sith flotilla to the planet. After searching for Abeloth in various locations and being attacked twice by Sith under the command of Saber Tola Annax, Vestara and the Skywalkers located Abeloth in the city of Crystal Valley.

In a pumping station there, they found the psychotic Jedi Valin Horn with Abeloth, who was in the guise of former Jedi Callista Ming. Luke successfully extracted Ming's spirit from the entity, and the Master of the Theran Listeners, Nenn, whom Abeloth had also possessed, committed suicide, severely weakening Abeloth. Horn lost consciousness, and Vestara and the Skywalkers were immediately ambushed by a group of Sith. Vestara killed one of the planet's sentient crystals, a tsil, resulting in a major death convulsion that further weakened Abeloth and gave Vestara and the Skywalkers time to flee the area with Horn. Meanwhile, Gavar's forces had arrived in orbit, where they were ambushed by a Jedi StealthX starfighter wing that had been called in by Luke days previously. Upon rendezvousing with the Jedi forces, Luke piloted one of the StealthXs in pursuit of Abeloth, who fled in the meditation sphere Ship. The Sith flotilla sustained heavy damage from the Jedi and was forced to retreat, but Luke was hit before he could destroy Ship, and Abeloth escaped. As Luke recovered from his injuries and the Sith regrouped, Abeloth contacted the Sith fleet and proposed an alliance to defeat the Jedi.

Text and facts from the “Operation Shieldfall” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.